Quick dumping valve



. y 1949- J. H. CANTLIN' 2,474,826

QUICK DUMPING VALVE Filed June 7, 1944 F'IE.3

ISA.

INVENTOR c/o/wv fr- Cawvr l/V Patented July 5, 1949 UNITED? STATES PATENT OFFICE .qulcxnua cvsnvn John n. cmmn, Auburn, Maine Application June '7, 1944, Serial No. 539,166

(Granted be effectively smothered. The usual amount of fluid discharged ranges from five to ten pounds in a period of one to two seconds. In order to accomplish this very high rate of flow, it is essential that the valve offers the resistance to the flow when open, while maintaining an absolutely tight seal prior to dumping.

One object of the invention isto provide a valve a,

which when closed, will provide an eifectiveseal to the flow of fluids, and which will offer a minimum resistance to the flow of the fluid when n.

lnother object of the invention is to provide a valve in which the danger of clogging the passage during operation is reducedto a minimum. Still another objectis to provide a valve which will permit refilling of the fluid container without disturbing the valve seating.

Still another object of the invention is to provide a valve which will permit thecontainer to be recharged without the use of special equipment.

A further object of the invention is to provide a valve which can be economically manufactured and which will be positive and rapid in its action.

a A still further object is to provide a. valve which can be opened rapidly from a point remote there from.

Other objects will become apparent upon considering the following specification which, when taken in conjunction with the accompanying drawing, discloses preferred forms of the invention.

Inthe drawings: 1 a

Fig. 1 is a vertical cross-section of a discharge: valve for flre extinguishers or the like involqng the present invention; l l

Fig. 2 is an elevational view partly in crosssection of the valve shown in Fig.1; a

Fig. 3 is a plan view of the valve disk;

Fig. 4 is an elevational viewpartly in crosssection showing a modification of the invention and the form thereof which is at present preferred by me; and

under the m or March a. 1883, as amended April so, 192s; 370 o. G. 751) Fig. is a cross-section on the line 5-5 of Fig. 4, looking in the direction of the arrows.

Referring to Figs. 1 and 2, the valve shown has a valve chamber I 0 with a, valved aperture H passing through the wall thereof, through which fluid under pressure may be supplied to the fluid container (not shown). The valve Ila in the opening ll may be of the ball type and spring loaded to prevent escape of pressure from the container.

The valve chamber I 0 contains a seat ii on which is a gasket l3, which is adapted to form a seal between the seat l2 and an anvil I4. The

anvil I4 is provided with a well l5 having an annular cylindrical wall I G which cooperates with an annular shear 20 to cut a valve disk l1, shown separately in Fig. 3. The valve disk I! is held in positionbetween the anvil l4 and a firing plug 2 I, the entire periphery of the disk being held clamped between the anvil and the firing plug 2| by means of a. ring nut 23. The ring nut 23 has exterior threads receivable in interior threads 24 in the top of the valve chamber wall.

The firing plug 2| has an annular recess 21 therein,- the inner lip of which lies slightly above the disk I l, and is of the same inside diameter as the inner periphery 'of the annularwall IS.

The annular shear 2b, which is movably mounted in the recess 21, is actuated by the explosion of a powder charge 30, which is carried in a powder chamber 3! preferably made of plastic material. The powder 30 is ignited by a conventionalelectric firing mechanism including a lead-in wire 33. Radial ports 35 may be provided around the periphery of the recess 2'! which are uncovered after the shear 20 has completed cutting the valve disk, to provide for the escape of the products of combustion.

The valve disk ii is provided with a substan-' tially T-shaped reinforcement 31 which is fixed to the disk II by soldering or other suitable means. The anvil II is provided with a non-cutting portion 38 directly over the stem of the T- shaped reinforcment so that when the disk is cut by the shear, the portion across the T-shaped reinforcement will remain uncut, the valve disk then being blown close to the wall of the passage andproviding uninterrupted flow to the fluid. The reinforcement 31 insures against the valve disk I! tearing loose and becoming stuck in the passage to impede the flow of fluid.

Referring now to Figs. 4 and 5, the valve shown therein has a preferred form of valve chamber ll with an enlarged recess at its upper end, the bottom of which forms a seat 4| for a gasket 42.

with a recess 48 adjacent the lower end, which 4 andtheflrlngplueisscrewedintoplaeeinthe valve chamber 48.

The ring nut ll withthepacking'li isthen screwed tight on the valve chamber 48 and the flring plug 41 backed oil its seat until it is firmly in engagement with the packing Ii. At this point thebottomottheflringpl-ugisabovetheports houses an annular shear ring 58, similar to the ring 20 shown in Figs. 1 and 2. The lower end of the recess 48 is enlarged and threaded as at 5i to receive an anvil 52. The anvil 52 engages in screw threads in the enlarged portion ii of the recess 48 and clamps a valve disk 58 between itself and an annular shoulder in the recess 48. v

The valve disk 53 is identical to the disk "-31 shown in Figs. 1 and 3.

The anvil 52 has a recess 55 therein which accommodates the cutting edge 01' the shear ring 58, so that as the ring 58 moves downwardly the valve disk 58 is sheared between the ring 5|] and the recess 55 in the anvil 52.

The valve chamber 48 has a boss 51 formed on one side thereof, the boss having a recess 58 of suflicient diameter and length to accommodate a standard size blank cartridge 58 containing an explosive charge. Electrical means 68 are provided to explode the cartridge upon completion of an electric circuit. The expanding gases from the burning explosive pass into apertures iii-6| in the valve chamber, and from these into an annular aperture 63 in the firing plug 41 and through recesses 84 and into the recess 48 above the shear ring 50. The gas pressure above the 1 ring 50 forces the shear ring 50 down and shears the valve disk 58 around the major portion of its periphery. Shearing the disk 53 permits pressure from the fluid container to blow the disk upthe packing ring 1| will insure a tight seal between the nut 18 and the firing plug 41.

Operation In the form of the invention shown in Figs. 1 and 2, the valve disk I! is clamped in place between the firing plug 2| and the anvil i 4 and the valve-screwed into position on the container (not shown) through the screw thread provided on the valve.

The container is then charged through the valved opening II, and the complete assembly placed in position for use, with the electric cir cuit connected through the wire 33.

8|. The cap 18 is then unscrewed from the boss 51, the cartridge I. removed and the fluid container charged byconnectingareserveiiuid cylinder (not shown) to the threads I8 on the end or theboss II. Fluidwillthenflowirom the reserve container through the apertures 8i and into the fluid container which is controlled by the valve disk 88.

When the fluid container is fully charged, the

firing plug 41 is screwed down until it seats on the gasket 42. The reserve cylinder may then be detached from the boss 81, the cartridge 68 reinserted and the electrical connection completed.

When the cartridge I8 is fired, the expanding.

giving a Practically unobstructed passage to the It is to be understood that the-forms of the invention herein shown and described are to be taken as preferred examples of the same and that various changes in the Shape. size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope oi the appended claims.

Whatisclaimedasnewanddesiredtosecure by Letters Patent is:

1. Aquick dumping valve adapted to be secured to a fluid container comprising, in cinnbination, a valve body consisting of two principal parts, one being partly received within the other, and means to secure the parts together; both parts having a passageway entirely through the valve body; an imperiorate. rupturable valve disk lying athwart said passageway; an anvil within the valve body means clamping the valve disk adjacent the anvil so as to close and seal said passageway, said clamping means surrounding and being entirely outside of the passageway but within the valve body; a shear member adapted to cooperate with said anvil and also surrounding the passageway and likewise bein entirely outside thereof but within the valve body, in which it is movable axially of the passageway; and

means including an explosive charge for actuating When it is desired to open the valve to, discharge the fluid in the container, the electric circuit is completed through the wire 33 exploding the powder, forcing the shear 20 downwardly and cutting the valve disk I! around the periphery thereof except across the leg of the T- shaped reinforcement 31.

Pressure from the fluid container blows the valve disk upwardly against the side wall of the valve passage permitting free and very rapid escape of the extinguisher fluid, thereby to smother the fire.

In the form of the invention shown in Figs. 4 and 5, the valve disk 53 is clamped between the anvil 52 and the shoulder on the firing plug 41,

the shear member to rupture the valve disk.

2. The invention as set forth in claim 1. wherein the passageway is of uniform diameter clear through the valve-body; the valve disk having a non-rupturable substantially T-shaped reinforcement thereon to anchor it at one point on its periphery to the clamping means, so that the valve disk may be flattenec' by fluid pressure against the inside of the pas ageway and will not be blown into a fluid-obstrwting position.

3. A quick dumping valve adapted to be secured to a fluid container comprising, in combination, a valve body having a passage therethrough-and consisting oitwo parts one of which has threaded connection within the other, said one part providing a chamber and the other part providing a support; an anvil on said support adiacent said chamber; an imperi'orate, rupturablc valve disk; means to clamp the valve disk within the valve body adjacent the anvil and in position to prevent any flow of fluid through said passage; a shear movably mounted in said chamber for cooperation with said anvil; an explosive charge mounted on the valve body; means to detonate the explosive charge; ports in the valve body to conduct at least part of the products of combustion oi the explosive charge to one surface of the shear to move ittoward the anvil and out the valve disk through the major portion of the periphery thereof to open the passage in the valve body; a nut and packing carried by the said one part to provide a seal outside of the threaded connection thereof with said other part, irrespectiveof the position of said one part within the other, so that fluid under pressure may not escape at the connection; a boss on the said other part having a chamber for the explosive charge; a cap threaded on the .boss and being removable to permit renewal of the charge or removal thereof to provide for connection of a fluid pressure container to the boss; the said one part being arranged and adapted to be backed ofl sumciently to engage said packing and clear' parts together, an anvil within the valve body,

a ring like shear member within the wall of the valve body and surrounding said passageway but being entirely outside thereof, said shear member being cooperatively positioned with respect to the anvil and being movable axially of the passageway, an imperforate rupturable valve disk! lying athwart said passageway between the anvil and the shear member and having its marginal portion clamped between the anvil and a surface portion of one of the principal parts so as to close and seal the passageway, and means including an explosive charge for actuating the shear member to rupture the valve disk.

5. The structure defined in claim 4 wherein the means including an explosive charge is in the form 0! a frangible hollow annulus movable axially in the opening in the wall of the valve body adjacent said ring like shear member, the hollow of said annulus containing the explosive.

6. A valve body consisting of upper and lower axially aligned body parts, the upper being partly received within the lower and both having coaxial passageways of the same diameter extending entirely through the two said parts, means to secure the parts together, an annular anvil coaxially held in the valve body between the two said body parts, an annular recess coaxially formed in the underside of the upper body part, the inner diameter of the recess being somewhat larger than and surrounding the coaxial passageways, an annular shear member slidable in said recess in axial alignment with said annular anvil, an imperforate rupturable valve disk clamped between the upper body part and the anvil and obstructing said passageways, and a hollow frangible ring including an explosive charge freely fitted to said recess above said shear member.

JOHN H. CANTLIN.

REFERENCES CITED The following referenlces are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 824,934 Jenczewsky July 3, 1906 1,882,700 Allen et al Oct. 18, 1932 1,914,250 Gillen June 13, 1933 1,933,694 Allen et a1. Nov. 7, 1933 1,951,897 Binckley Mar. 20, 1934 1,954,285 Denk et al Apr. 10, 1934 1,974,254 Allen et a1 Sept. 18, 1934 1,984,510 Allen et al Dec. 18, 1934 2,047,049 Allen July 7, 1936 2,095,828 Nerad Oct. 12, 1937 2,262,925 Cole Nov. 18, 1941 2,276,830 Doran Mar. 17, 1942 2,301,365 Bushnell Nov. 10, 1942 2,304,417 Mason Dec. 8, 1942 FOREIGN PATENTS Number Country Date 435,219 Germany Oct. 11, 1926 

